@ARTICLE\{IMM2000-01225,
    author       = "P. Lodahl and M. Bache and M. Saffmann",
    title        = "Spiral intensity patterns in the internally pumped optical parametric oscillator",
    year         = "2000",
    month        = "nov",
    pages        = "4506-4509",
    journal      = "",
    volume       = "85",
    editor       = "",
    number       = "21",
    publisher    = "Physical Review Letters",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1225-full.html"
}